Activate Hearthhull by paying 1, tapping it and sacrificing a land.
If Hearthhull has eight or more charge counters on it, it triggers, causing each opponent to lose 2 life.
Resolve the Hearthhull ability, causing you to draw two cards and allowing you to play an additional land this turn.
Play the land from your graveyard.
When the land enters the battlefield, Tireless Tracker triggers twice due to Elesh Norn, creating two artifact tokens.
Activate Clock of Omens by tapping the artifact tokens, untapping Hearthhull.
Repeat.
This ingenious engine transforms the simple act of sacrificing a land into a self-sustaining storm of card draw and life drain, anchored by Hearthhull, the Worldseed as both your sacrifice outlet and win condition. Once Hearthhull reaches eight charge counters to animate and unlock its drain ability, every sacrifice chips away at your opponents while feeding you fresh resources. To keep the loop turning, Conduit of Worlds lets you seamlessly replay your sacrificed lands straight from the graveyard, while Elesh Norn, Mother of Machines doubles up Tireless Tracker's landfall triggers so that every dropped land floods your board with Clue tokens. Finally, Clock of Omens acts as the mechanical heart of the operation, letting you tap those newly minted artifact tokens to untap Hearthhull and do it all over again.